I can't comment on the comparison between the two rods you mentioned but Ive owned two Beulahs and two Echos (all switch or spey rods) at one time or another. If I was forced to pick between companies I would probably take the Beulah. The Classic rods have more of a moderate action that feels good to me. Again, I've never handled the Echo 3 so I don't know what it's all about. Echo does have a stellar warranty. I don't know about Beulah though. I doubt any of this helps, casting them both would be the best, but you can't always do that.
For what it's worth, the one rod of that group that I still have is the Beulah Platinum. It's not going anywhere.